Check the listing for details. STI SSP100 Fire Barrier Putty,Bar 4MM46. Condition: New. Listed at 49.99 USD. Fire Barrier Putty, Application Method Hand, Color Red, Container Size Not Applicable, Container Type Bar, Drying Time Not Applicable, Expansion Temperature 230 Degrees F, Expansion Volume 500X, Fire Rating 3 hr, Fire Resistance Type Intumescent, Firestop Type Putty Pad, Flame Spread Index Not Applicable, Flame Spread Rating Not Applicable, For Material Type Cabling, outlet boxes, For Use On Cables, Electrical Box, Metal Pipe, Formulation Compound, Maximum Service Temperature 120 Degrees F STI(R) SpecSeal(R) SSP Firestop Putty is ideal for sealing cabling penetrations and outlet boxes. This putty is nonhardening and easily hand works around grouped cabling penetrations forming a re-enterable seal allowing for future work. When applied to outlet boxes, SSP Putty easily works into voids and.